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POPSFring -- Free Mobile VoIP, IM and More Fring is a peer-to-peer Mobile VoIP based internet telephony network which enables users to interact with social networks and to call and chat for free. Recently it also launched an API, allowing third-party developers to develop new applications for the community.
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POPSSkype Explained Flash HQ has a great article on Voice Over IP (VoIP) and how one could use it to reduce your monthly phone service bill.
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POPSooVoo: high-quality video chat According to Buzzfeed (http://snipr.com/1p1fw), this site has become a favorite of deaf users, who need high-quality video in order to use sign language.
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POPSSkype based Call-Center A full featured Click to Call Center built on Skype that enables companyies of any size to integrate voice, chat and video to their website SKYclick creates a Click to Call button that users connect to their website. Site visitors click on the button to be called back for free. SKY-click forwards incoming calls to the appropriate agent and handles all tasks usually managed by call centers; agent availability, call queuing, feedback database, reporting and more.
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POPSEducational applications for mobile phones Some campuses are starting to take advantage of the ubiquity of mobile phones among students to develop new ways of communicating and building community. The story presents this as mostly a positive thing, but I wonder how successful it can really be.
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POPSBluetooth Retro Handset I'd love to buy this.. but I don't think I could pull it off in public. I'd be too embarassed with everyone staring. Even tho it's f*ckin cool! :)))
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POPSFree, temporary phone number I haven't tried this yet. If some intrepid person gives it a shot, post the results here. Get a free temporary phone number that expires after one week. Intended for online sellers.
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POPSCellphone - a dream of the thirties Just found a funny pic. It's a 1930 vision, that dreams of everyone having a mobile transmitting and recieving device to speak with his family via a determined wave. Audio and video transmission are much improved and the device is not bounded to a fix place, but able to be carried in a bag, not bigger than a photocamera. Look at this box, that the one woman has hanging around her neck. ^-^